Carbureter



W. R. CLARK.

CARBURETER.

APPLICATION FILED AUGJ, |919.

Patented Aug. 2, 1921.

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UNITED STATES PATENT -OFFICE.

WILLIAM R. CLARK, OF SEATTLE, WASHINGTON.

CARBURETER.

Application led August 7, 1919.

To all whom t may concern:

Be it known that I, IVILLIAM R. CLARK, a citizen of the United States, residing at Seattle, in the county of King and StateA of Washington, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

This invention relates to carbureters. The object of my invention is to provide a carbureter which is simple in construction, occupying relatively little space, adapted to be conveniently applied to engines now in use, and one which may be readily adjusted to suit varying conditions so that it may be efficiently used with gasolene, kerosene and other hydrocarbons.

The invention consists in the novel construction, adaptation and combination of parts as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a longitudinal vertical section of a carbureter embodying the present invention.

Fig. 2 is a view partly in end elevation and partly in transverse section of the same. Fig. 3 is a horizontal section taken through 3-#3 of Fig. 1.

In carrying out my invention, I provide a casing formed, as shown in Fig. 1, of an upright cylindrical member 5 and a horizontal tubular member 6, the latter having intermediate its length a depending coupling element 7 into which is engaged the member 5.

The casing member 5 is closed at the bottom, as by a cap 8, and is closed at its top by a partition 9 to afford thereabove in the element 7 a chamber 10, hereinafter, designated as the charging chamber, of a conoidal shape which communicates by a throat 11 with the mixing chamber 12 within the member 6. -Air inlet holes 13 are provided in the peripheral wall of the charging chamber 10. A tube coil 14 is arranged concentrically to the axis of the heating chamber 15 within the casing member 5, the upper or inlet end of said coil extending through the peripheral wall thereof. 16 represents an angle-valve body connected to said inlet-end by one of its branches and by another branch to a pipe 17 which in practice is connected to the source of liquid fuel supply.

The valve proper 18, Fig. 3, is of the needle type. The lower or outlet end of the tube coil 14 is connected to a cross fitting 19 located in the lower end of the heating cham- Specification of Letters Patent.

Patented Aug. 2, 1921.

Serial No. 315,973.

ber 15. Said fitting has therein a passage 2O affording communication between said coil and the lower end of an upright pipe 21 which is disposed axially of the chamber 15 and is provided at its upper end with a noz zle 211 which extends through the partition 9 into the charging chamber 10. A drain cock 22 is provided on the fitting 19 exteriorly of the casing member 5. A needle valve 23 extends into said fitting and is employed, upon occasion, to regulate or close the opening` between the passage 2O and the pipe 21. The valve 23 is desirably provided on its stem with a disk or wheel 24 having peripheral notches into which selectively'is engageable a spring latch 25 for releasably securing the valve in adjusted positions. Included in the invention is an electroheating device consisting of a coil or coils of resistance wires 26 wound about a hollow core 27 of porcelain or other suitable material and through which the aforesaid pipe 21 extends. rIhe resistance wiresv 26 have their ends connected through insulating plugs 28 with leads 29 of current transmitting wires connected with a suitable battery or other'- source of electric energy.

The heat produced by such device within the chamber 15 serves to raise the temperature of the tube coil sufficiently to vaporize the liquid fuel passing therethrough and also acts through the medium of the core 27 and lpipe 21 to superheat such vaporized fuel prior to its being emitted from the orifice of the nozzle 211. A fibrous or gauze material, indicated by 30, of relatively high heat conductivity is desirably provided within the pipe 21 to facilitate the superheating of the oil vapors passing therethrough.

An internal lining 31 of a heat insulating material is provided for the casing member 5 for the purpose of retaining the heat within the chamber 15 at a comparatively even temperature during the operation of the carbureter. 38 represents a throttle valve located in proximity of the outlet of the mixing chamber 12, and has a bell-crank leverI close simultaneously. The chamber 12 from the throat opening 11 to the outlet. end is preferably of cylindrical form and is also of similar form in proximity of the inlet end, but between the latter and the throat the chamber is formed with a bulbous portion 121. 37 represents a bushing fitted within the inlet end of chamber 12 and operatively connected to said bushing is a disk valve 38 which seats against the inner end of 371 of the bushing. This valve opens inwardly with respect to chamber 12 when there is sufficient suction within the latter to overcome the power of a spring 39 which serves to normally retain the valve against its seat.

In operation, gasolene or other liquid hydrocarbon supplied to the coil 14 becomes vaporized therein and is superheated in the pipe 21 by means of the electroheater and issuing from the nozzle 211 through the charging chamber 10 serves to saturate a quantity of primary air admitted through the holes 13, the flow of the fluids being promoted by a partial vacuum obtaining within the chamber 12 by reason of the suction strokes of the pistons of an associated engine. When the suction caused by the engine is relatively small within the mixing chamber, the supply of fuel from the carbureter will be small and may be regulated by closing, more or less, the throttle valve 33 and needle valve 18 through the instrumentality of the operating rod 35.

When the suction within the chamber 12 is normal the inlet valve 38 opens to admit secondary air to mix with the charge delivered into such chamber from the charging chamber 10.

The more complete mixture of the fuelwith the primary and secondary air is effected in the present invention, first, by preheating vaporized fuel before mixing with the primary air to render the latter highly saturated; and, second, to the manner of delivering the saturated primary air into the mixing chamber at right angles, approximately, to the current of secondary air passing axially through such mixing chamber so that the two currents become intimately associated with a resulting fuel mixture of suitable proportions.

The mixture may, however', be made richer or leaner by regulating the throttle and needle valve 23.

What I claim, is-

1. A carbureter having a mixing chamber, a heating chamber, a charging chamber interposed between the aforesaid chambers and separated by an imperforate partition from said heating chamber, said charging chamber communicating with the mixing chamber between the inlet and outlet ends thereof, said charging chamber being provided with air inlet openings, a vaporizer provided within said heating chamber, a discharge nozzle provided for the vaporizer in said charging chamber, an electro-heating device for the vaporizer provided in said heating chamber, a throttle valve in the mixing chamber, a valve for regulating the lsupply of an explosive fluid to said vaporizer, and means 'for regulating said valves simultaneously.

2. In a carbureter, a'mixing chamber having a throttle valve therein, a charging chamber provided with air inlets and communicating with the mixing chamber between the air inlet end thereof and said throttle valve, said communication being arranged in rectangular relation with respect to the axis of the mixing chamber, a vaporizer provided exteriorly of said chamber and having a discharge nozzle extending into said charging chamber, a valve for regulating the supplyrof a hydro-carbon fluid to said vaporizer, means for regulating said valves, a casing member inclosing said vaporizer, and an electro-heating device provided in said casing for vaporizing the fluid passing through said vaporizer.

3. In a carbureter, the combination with a horizontally tubular mixing chamber having Y p inlet and outlet openings at its opposite ends and an aperture intermediate its length, a heating chamber subjacent to said mixing chamber, a pipe arranged axially within the heating chamber and extending upwardly from the lower portion ofthe same, a nozzle provided upon the upper end of said pipe and directed through said aperture at approximately right angles to the axis of the mixing chamber, a tube coil connected to the lower end of the pipe, to issue from a heating device interposed between said tube coil and said pipe for vaporizing hydro-carbon liquids passing through the same and the nozzle into the mixing chamber.

4. In a carbureter, a mixing chamber, a heating chamber, a charging chamber interposed between the aforesaid chambers and communicating with the mixing chamber' and having a partition preventing communication between the heating and charging chambers, said charging chambers having air inlet holes in its peripheral wall, a liquid conducting means extending 'through said heating chamber into the charging chamber, and an electroheating device provided in the heating chamber to effect the vaporizing of the liquid passing through said conducting means. Y

5. In a carbureter, a mixing chamber, a heating chamber, a charging chamber, interposed between the aforesaid chambers and communicating with the mixing chamber, said Vcharging chambers having air inlet holes in its peripheral walls,tubular liquid conducting means extending through said heating chamber into the charging chamber and having no opening into the space Within said heating chamber, an electroheating de- Vice provided in the heating chamber to effeet the vaporizing of the liquid passing through said Conducting means, a throttle valve in the mixing chamber, a Valve for regulating the supply of liquid t0 said Conducting means7 and means operatively conneeted to both of the valves for controlling the saine simultaneously.

Signed at Seattle, Washington, this 25th day of July, 1919.

WILLIAM R. CLARK.

Witnesses 

